WO2014022966A1 - Système d'accès, et procédé et dispositif de communication d'un réseau à fibre optique - Google Patents

Système d'accès, et procédé et dispositif de communication d'un réseau à fibre optique Download PDF

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Publication number
WO2014022966A1
WO2014022966A1 PCT/CN2012/079767 CN2012079767W WO2014022966A1 WO 2014022966 A1 WO2014022966 A1 WO 2014022966A1 CN 2012079767 W CN2012079767 W CN 2012079767W WO 2014022966 A1 WO2014022966 A1 WO 2014022966A1
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WIPO (PCT)
Prior art keywords
physical layer
pon
physical
user
onu
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PCT/CN2012/079767
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English (en)
Chinese (zh)
Inventor
郑若滨
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201280001150.3A priority Critical patent/CN103875216B/zh
Priority to PCT/CN2012/079767 priority patent/WO2014022966A1/fr
Priority to EP12882723.5A priority patent/EP2770675B1/fr
Publication of WO2014022966A1 publication Critical patent/WO2014022966A1/fr
Priority to US14/322,574 priority patent/US9413480B2/en
Priority to US15/212,832 priority patent/US9628213B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605—Fixed allocated frame structures
    • H04J3/1652—Optical Transport Network [OTN]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27—Arrangements for networking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2858—Access network architectures
    • H04L12/2861—Point-to-multipoint connection from the data network to the subscribers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2869—Operational details of access network equipments
    • H04L12/2878—Access multiplexer, e.g. DSLAM
    • H04L12/2879—Access multiplexer, e.g. DSLAM characterised by the network type on the uplink side, i.e. towards the service provider network
    • H04L12/2885—Arrangements interfacing with optical systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0071—Provisions for the electrical-optical layer interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0064—Arbitration, scheduling or medium access control aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0079—Operation or maintenance aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q2011/0084—Quality of service aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1301—Optical transmission, optical switches

Definitions

  • the present invention relates to the field of communications, and in particular, to an access system, a communication method, and a device for an optical fiber network. Background technique
  • FTTH Fibre To The Home
  • FTTDp Fibre To Drop/Distribution Point
  • the existing access systems of the optical fiber network mainly include: an ONU (Optical Network Unit) and an OLT (Optical Line Termination).
  • the OLT and the ONU are connected through an optical fiber, and are used to send downlink data to the ONU or receive uplink data sent by the ONU.
  • the ONU can complete a PON (Passive Optical Network) MAC (Media Access Control) of the optical network.
  • PON Passive Optical Network
  • MAC Media Access Control
  • the control function, the control plane function of the ONU, and the QoS (Quality of Service) function, and the ONU can be connected to the CPE (Customer Premises Equipment) through the copper or wireless interface that has already entered the home.
  • CPE Customer Premises Equipment
  • the ONU is a device provided by the operator.
  • the ONU needs to be placed close to the user side and away from the carrier network (such as a home).
  • the external wall of the house has a large number of ONUs, and the ONU needs to complete many functions such as PON MAC function, ONU control plane function and QoS. Therefore, when there is a large number of ONUs in the optical network, the ONU in the optical network is caused. Maintenance is difficult and maintenance costs are high.
  • the embodiment of the present invention provides an access system, a communication method, and a device for the optical fiber network.
  • the technical solution is as follows:
  • An access system for a fiber optic network comprising:
  • the OLT is configured to allocate an uplink time slice and a downlink time slice for each user equipment that accesses the optical network.
  • An ONU physical converter is connected to the OLT through an optical fiber, and is configured to receive a PON physical layer frame sent by the OLT by using a PON physical signal, and convert the PON physical layer frame into a first user side corresponding to the non-PON physical signal.
  • a physical layer frame and sending the first user-side physical layer frame to the user equipment by using a non-PON physical signal; or receiving a first user-side physical layer frame sent by the user equipment by using a non-PON physical signal, Converting the first user side physical layer frame into a PON physical layer frame corresponding to the PON physical signal, and transmitting the PON physical layer frame to the OLT by using the PON physical signal;
  • the user equipment is connected to the ONU physical converter through a non-PON optical fiber and is located on the user side, and is configured to implement a control plane function and a PON MAC function of the ONU, and pass the ONU physical converter according to the uplink time slice.
  • the OLT sends the first user-side physical layer frame, or receives the first user-side physical layer frame sent by the OLT through the ONU physical converter according to the downlink time slice.
  • the system further includes:
  • the POS is used to receive the PON physical signal sent by the OLT, and is allocated and sent to different ONU physical converters.
  • the client device reports the data queue status to the OLT through the ONU physical converter.
  • the OLT allocates an uplink time slice and a downlink time slice to the user equipment, and sends configuration information including the uplink time slice and the downlink time slice to the user equipment by using the ONU physical converter;
  • the user equipment sends uplink data to the OLT or receives downlink data from the OLT through the ONU physical converter according to the configuration information. Further, before the user equipment reports the data queue status to the OLT through the ONU physical converter, the method further includes:
  • the user equipment receives the second physical layer parameter that is sent by the OLT through the ONU physical converter; the user equipment and the ONU physical converter are established according to the second physical layer parameter delivered by the OLT New communication connection.
  • the method further includes:
  • the user equipment and the ONU physical converter establish a communication connection according to a default first physical layer parameter; the user equipment establishes a communication connection with the OLT;
  • the default first physical layer parameter is pre-stored in the user equipment and the ONU physical converter. Further, after the user equipment sends the uplink data to the OLT or the downlink data from the OLT by using the ONU physical converter, the method further includes:
  • the user equipment reports the status of the physical line connected to the OLT to the OLT through the ONU physical converter.
  • the method further includes:
  • the user equipment establishes a new communication connection with the ONU physical converter according to the third physical layer parameter, and obtains a redistributed bandwidth;
  • the OLT restores bandwidth for the user equipment.
  • the OLT restores the bandwidth for the user equipment, specifically:
  • the OLT sends the second physical layer parameter to the user equipment through the ONU physical converter; the user equipment and the ONU physical converter re-establish a communication connection according to the second physical layer parameter And the user equipment and the ONU physical converter re-establish a communication connection, so that the user equipment recovers the bandwidth before the temporary communication.
  • a user equipment, the user equipment and the ONU physical converter are connected through a non-PON fiber and located on the user side, and are used to implement the control plane function and the PON MAC function of the ONU, and pass the ONU according to the uplink time slice allocated by the OLT.
  • the physical converter sends a first user-side physical layer frame to the OLT, or receives a first user-side physical layer frame sent by the OLT through the ONU physical converter according to the downlink time slice allocated by the OLT.
  • the user equipment is further configured to receive, by the OLT, a second physical layer parameter that is sent by the OLT through the ONU physical converter, and a second physics that is sent by the ONU physical converter according to the OLT.
  • the layer parameters establish a new communication connection.
  • the user equipment is further configured to: before receiving the second physical layer parameter sent by the OLT by the ONU physical converter, and the ONU physical converter according to a default first physical layer parameter Establishing a communication connection and establishing a communication connection with the OLT;
  • the default first physical layer parameter is pre-stored in the user equipment.
  • the user equipment is further configured to report the location to the OLT by using the ONU physical converter The state of the physical line of the communication connection of the OLT.
  • the user equipment includes:
  • a user-side interface unit configured to receive an uplink second user-side physical layer frame sent by the user, or send a downlink second user-side physical layer frame to the user;
  • a virtual ONU processing unit configured to implement an ONU control plane function, a PON MAC function, and a quality of service QoS function, and encapsulate the uplink second user side physical layer frame as an uplink PON MAC layer frame, and according to the uplink allocated by the OLT Transmitting, by the user-side physical layer processing unit, the uplink PON MAC layer frame to the ONU physical converter, or receiving the downlink PON MAC layer sent by the user-side physical layer processing unit according to the downlink time slice allocated by the OLT a frame, the downlink PON MAC layer frame is converted into the downlink second user-side physical layer frame, and sent by the user-side interface unit to the user-side physical layer processing unit;
  • a user-side physical layer processing unit configured to convert an uplink PON MAC layer frame sent by the virtual ONU processing unit into an uplink first user-side physical layer frame corresponding to the non-PON physical signal, and send the The ONU physical converter; or receiving the downlink first user-side physical layer frame sent by the ONU physical converter, converting the downlink first user-side physical layer frame into the downlink PON MAC layer frame, and sending the The virtual ONU processing unit.
  • the user equipment further includes: a client equipment CPE unit;
  • the CPE unit is connected to the user-side interface unit and the user equipment UE, and is configured to receive the downlink second user-side physical layer frame sent by the user-side interface unit, and forward the frame to the UE, or receive The uplink data sent by the UE is converted to the uplink second user-side physical layer frame and sent to the user-side interface unit.
  • the user equipment further includes:
  • An external power supply unit is configured to supply power to the ONU physical converter.
  • An ONU physical converter the ONU physical converter is connected to the OLT through an optical fiber, and is configured to receive a PON physical layer frame sent by the OLT through a PON physical signal, and convert the PON physical layer frame into a non-PON physical signal.
  • the physical layer frame converts the first user-side physical layer frame into a PON physical layer frame corresponding to the PON physical signal, and sends the PON physical layer frame to the OLT by using the PON physical signal.
  • the ONU physical converter is further configured to forward, to the user equipment, a second physical layer parameter that is sent by the OLT, and a second physical layer that is sent by the user equipment according to the OLT according to the OLT. Parameters to establish a new communication link Pick up.
  • the ONU physical converter is further configured to: before the user equipment receives the second physical layer parameter that is forwarded by the OLT by the ONU physical converter, and the user equipment according to the default Establishing a communication connection by a physical layer parameter;
  • the default first physical layer parameter is pre-stored in the user equipment.
  • the ONU physical converter is further configured to forward, to the OLT, a state of a physical line of the communication connection reported by the user equipment.
  • the ONU physical converter includes: a non-PON physical layer processing unit, a switch control unit, a switch unit, and a PON physical layer processing unit;
  • the non-PON physical layer processing unit is configured to receive an uplink first user-side physical layer frame sent by the user equipment by using a non-PON physical signal, and convert the uplink first user-side physical layer frame into an uplink PON MAC layer a switch control unit, configured to: when receiving an uplink PON MAC layer frame sent by the user equipment, generate a switch control signal corresponding to the user equipment, and connect the user equipment to the user equipment Corresponding switch control signal is sent to the switch unit;
  • the switch unit includes an output port and at least one input port, and the input port is in one-to-one correspondence with the user equipment that accesses the ONU physical converter, and is configured to be used according to the user equipment corresponding to the user equipment
  • the switch control signal turns on a path between the input port corresponding to the user equipment and the output port, and the path is used by the non-PON physical layer processing unit to send the non-transport to the PON physical layer processing unit
  • the PON physical layer processing unit is configured to convert the uplink PON MAC layer frame into an uplink PON physical layer frame, and send the uplink PON physical layer frame to the OLT by using a PON physical signal.
  • the ONU physical converter includes: a non-PON physical layer processing unit, an Ethernet bridge, and a PON physical layer processing unit;
  • the non-PON physical layer processing unit is configured to receive an uplink first user-side physical layer frame sent by the user equipment by using a non-PON physical signal, and convert the uplink first user-side physical layer frame into an uplink PON MAC layer a frame, and transmitting, by the input port corresponding to the non-PON physical layer processing unit, the uplink PON MAC layer frame to the Ethernet bridge;
  • the Ethernet bridge includes an output port and at least one input port, configured to receive the uplink PON MAC layer frame sent by the non-PON physical layer processing unit by using the input port, and send the uplink PON MAC layer frame through the output port The PON physical layer processing unit;
  • the PON physical layer processing unit is configured to receive the uplink PON MAC layer frame sent by the Ethernet bridge through the output port, and convert the uplink PON MAC layer frame into an uplink PON physical layer frame, and pass the PON The physical signal transmits the uplink PON physical layer frame to the OLT.
  • the ONU physical converter includes: a PON physical layer processing unit, a non-PON physical layer processing unit, a port corresponding to the user equipment accessing the ONU physical converter, and a downlink data replication unit;
  • the PON physical layer processing unit is configured to receive a downlink PON physical layer frame sent by the OLT through a PON physical signal, and convert the downlink PON physical layer frame into a downlink PON MAC layer frame;
  • the port is configured to respectively connect a line between the downlink data replication unit and the non-PON physical layer processing unit, where the line is used to send the PON physical layer processing unit to the non-PON physical layer processing unit. Converting the obtained downlink PON MAC layer frame;
  • the downlink data replication unit is configured to copy the downlink PON MAC layer frame converted by the PON physical layer processing unit to all lines belonging to the ONU physical converter;
  • the non-PON physical layer processing unit is configured to convert the downlink PON MAC layer frame into a downlink first user side physical layer frame, and send the downlink first user side physical layer frame to the downlink by using a non-PON physical signal Said client device.
  • the ONU physical converter includes: a PON physical layer processing unit, an Ethernet bridge, and a non-PON physical layer processing unit;
  • the PON physical layer processing unit is configured to receive a downlink PON physical layer frame sent by the OLT, and convert the downlink PON physical layer frame into a downlink PON MAC layer frame, and add an Ethernet to the downlink PON MAC layer frame. Obtaining an Ethernet frame from a frame header of the broadcast frame, and transmitting the Ethernet frame to the Ethernet bridge;
  • the Ethernet bridge includes an input port and at least one output port, configured to receive, by using the input port, the Ethernet frame sent by the non-PON physical layer processing unit, and send the PON physical layer processing unit;
  • the non-PON physical layer processing unit is configured to receive the Ethernet frame sent by the Ethernet bridge through the output port, and remove an Ethernet broadcast frame header in the Ethernet frame to obtain the downlink PON.
  • the MAC layer frame is configured to convert the downlink PON MAC layer frame into a downlink first user-side physical layer frame, and send the downlink first user-side physical layer frame to the user equipment by using a non-PON physical signal.
  • the beneficial effects of the technical solution provided by the embodiment of the present invention are: by establishing a user equipment, and the existing ONU
  • the control plane function, PON MAC function and QoS function of the ONU are moved down to the user equipment, and the existing ONU is removed as the ONU physical converter after removing the above functional module, and only has the PON physical layer frame and the first user side.
  • the physical layer frame conversion function therefore, the operator does not need to perform maintenance of the ONU control plane function, PON MAC function and QoS function, which reduces maintenance difficulty and greatly reduces maintenance costs.
  • FIG. 1 is a schematic structural diagram of an access system of an optical fiber network according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of an integrated structure of a user equipment according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic diagram of a second structure of an access system of an optical fiber network according to Embodiment 1 of the present invention
  • FIG. 4 is a connection of a new optical network in the case where an Ethernet bridge is not used according to Embodiment 2 of the present invention
  • Schematic diagram of the protocol stack into the system
  • FIG. 5 is a schematic diagram of a protocol stack of an access system of a new optical network in the case of using an Ethernet bridge according to Embodiment 2 of the present invention
  • FIG. 6 is a schematic diagram of an access system for an optical network that is free of configuration for an ONU physical converter according to Embodiment 2 of the present invention
  • FIG. 7 is a schematic diagram of another access system for an optical network that is free of configuration for an ONU physical converter according to Embodiment 2 of the present invention.
  • FIG. 8 is a schematic flowchart of a communication method of an optical network-based access system according to Embodiment 2 of the present invention
  • FIG. 9 is an online adjustment bandwidth of an optical network-based access system according to Embodiment 2 of the present invention. Schematic diagram of the process;
  • FIG. 10 is a schematic structural diagram of a user equipment according to Embodiment 3 of the present invention.
  • FIG. 11 is a schematic diagram of a second structure of a user equipment according to Embodiment 3 of the present invention.
  • FIG. 12 is a third schematic structural diagram of a user equipment according to Embodiment 3 of the present invention.
  • FIG. 13 is a schematic structural diagram of an ONU physical converter according to Embodiment 4 of the present invention.
  • FIG. 14 is a schematic structural diagram of an access system of an optical fiber network according to Embodiment 4 of the present invention.
  • 15 is a schematic diagram of a corresponding state of a user-side port, a switch control signal, and a PON optical module according to Embodiment 4 of the present invention
  • 16 is a second schematic structural diagram of an ONU physical converter according to Embodiment 4 of the present invention
  • FIG. 17 is a schematic diagram of a second configuration of an access system of an optical network according to Embodiment 4 of the present invention
  • FIG. 18 is a schematic diagram of a third structure of an ONU physical converter according to Embodiment 4 of the present invention
  • FIG. 19 is a schematic diagram showing a third structure of an access system of a fiber optic network according to Embodiment 4 of the present invention. detailed description
  • the embodiment provides an access system for a fiber optic network, and the system specifically includes:
  • the OLT 11 is configured to allocate an uplink time slice and a downlink time slice for each client device 13 that accesses the optical fiber network.
  • the ONU physical converter 12 is connected to the OLT 11 through an optical fiber, and is configured to receive the PON physical layer that is sent by the OLT 11 through the PON physical signal. a frame, the PON physical layer frame is converted into a first user-side physical layer frame corresponding to the non-PON physical signal, and the first user-side physical layer frame is sent to the user equipment 13 through the non-PON physical signal; or the user equipment is received.
  • the first user-side physical layer frame sent by the non-PON physical signal is converted into a PON physical layer frame corresponding to the PON physical signal, and the PON physical layer frame is sent to the OLT 11 through the PON physical signal.
  • the client device 13 is connected to the ONU physical converter 12 via a non-PON fiber and located on the user side for implementing the control plane function of the ONU, the PON MAC function, and the quality of service QoS function, and passes the ONU physical converter 12 according to the uplink time slice. Sending an uplink first user-side physical layer frame to the OLT 11, or receiving the OLT 11 by the ONU physical converter 12 according to the downlink time slice. A first side of the physical layer frame line user.
  • the PON physical signal transmitted between the ONU physical converter and the OLT is specifically a PON optical signal
  • the PON optical signal corresponds to a PON physical layer frame (PON PHY).
  • the non-PON fiber connection may include at least: a DSL (Digital Subscriber Line), a cable television cable, an Ethernet network cable, a power line, or a wireless interface, and the wireless interface may be a WiFi (Wireless Fidelity, Wireless fidelity) interface.
  • DSL Digital Subscriber Line
  • Ethernet network cable an Ethernet network cable
  • power line an Ethernet network cable
  • wireless interface may be a WiFi (Wireless Fidelity, Wireless fidelity) interface.
  • non-PON physical signals specifically include a DSL signal, a cable television cable signal, an Ethernet signal, a power line signal, and a wireless signal;
  • the first user-side physical layer frame includes a physical layer frame corresponding to the DSL, the cable television cable signal, the Ethernet signal, the power line signal, and the wireless signal.
  • the existing optical fiber network includes: EPON (Ethernet Passive Optical Network), next-generation EPON, GPON (Gigabit Passive Optical Network, Gigabit-free)
  • EPON Ethernet Passive Optical Network
  • GPON Gigabit Passive Optical Network, Gigabit-free
  • the client device can integrate the existing CPEs as an integrated device, and the specific explanation is as follows:
  • the integrated client device 13 can be obtained by connecting the existing CPE 132 and the virtual ONU 131, wherein, the virtual
  • ONU is a module with the following functions:
  • the ONU physical converter 12 is connected to the OLT 11 through the non-PON fiber and is located on the user side for implementing the control plane function, the PON MAC function and the QoS function of the ONU, and transmitting the uplink to the OLT 11 through the ONU physical converter 12 according to the uplink time slice.
  • the existing CPE 132 inside the client device 13 can be connected to a UE (User Equipment), and the virtual ONU 131 and the CPE can be connected through a DSL, a cable TV cable signal, an Ethernet signal, a power line signal, or a wireless interface.
  • the second user-side physical layer frame corresponds to a DSL physical layer frame, a power line physical layer frame, a cable physical layer frame, an Ethernet physical layer frame, or a wireless physical layer frame.
  • the second user-side physical layer frame is an Ethernet physical layer frame.
  • the CPE may be a home gateway, an enterprise network gateway, or a cell gateway
  • the UE may be a device such as a mobile phone, a tablet computer, or a notebook computer.
  • the uplink transmission and the downlink transmission of the data may be included, where the CPE to the OLT is the uplink direction, and the OLT to the CPE is the downlink direction.
  • the system further includes a POS for receiving the PON physical signal sent by the OLT, and distributing and transmitting the signal to different ONU physical converters.
  • the access system of the optical fiber network provided in this embodiment moves the control plane function, the PON MAC function and the QoS function of the ONU in the existing ONU to the user equipment by establishing the user equipment, and the existing The ONU is removed from the above functional module and becomes an ONU physical converter. It only has the conversion function of the PON physical layer frame and the first user side physical layer frame. Therefore, the operator does not need to perform the ONU control plane function, PON MAC function and QoS. Functional maintenance reduces maintenance and greatly reduces maintenance costs.
  • Example 2 Example 2
  • Embodiment 2 Based on the access system of the optical fiber network provided in Embodiment 1, since the system provided in Embodiment 1 is creatively improved on the existing ONU, the user equipment on the user side is established, and the existing ONU is ONU The control plane function, the PON MAC function and the QoS function are moved down to the user equipment, and the existing ONU is removed from the above functional module and becomes an ONU physical converter, which only has the PON physical layer frame and the first user side physical layer frame. The conversion function, at the same time, also improves the protocol stack used for communication in the optical fiber network. Therefore, the present invention also improves the communication method in the optical fiber network.
  • This embodiment 2 provides an improved communication method.
  • protocol stack used in the improved fiber system is first described:
  • connection between the customer equipment and the ONU physical converter through DSL is taken as an example.
  • a new optical network access system without using an Ethernet bridge is provided.
  • the direction from the CPE to the OLT is the uplink direction
  • the direction from the OLT to the CPE is the downlink direction
  • the downlink data transmission is the TDM (Time-Division Multiplexing) mode
  • the uplink data transmission is the TDMA. (Time Division Multiple Access, time division multiple access) mode
  • the OLT and the ONU physical converter are connected by optical fibers, and the DBA (Dynamic Bandwidth Allocation) can be configured for the accessed user equipment, that is, the uplink time slot and the downlink time slice are allocated to the accessed user equipment. And transmitting the information including the uplink time slice and the downlink time slice to the user equipment, where the OLT is further used by the OLT to send the PON MAC layer frame to the PON physical layer frame, and then send the signal to the ONU physical converter through the optical fiber;
  • DBA Dynamic Bandwidth Allocation
  • the uplink time slice is used to indicate that the user equipment sends the uplink data of the first uplink user side to the OLT, and the uplink data is sent by using the TDMA manner, so that the uplink data sent by different user equipments can be avoided in the physical converter.
  • the ONU physical converter does not need to perform QoS scheduling, and only performs physical layer frame conversion, which can greatly reduce maintenance costs.
  • the downlink time slice is used to instruct the user equipment to receive the first downlink user-side physical layer frame from the OLT. ;
  • the ONU physical converter and the plurality of client devices can perform mutual conversion between the PON physical layer frame (PON PHY) and the DSL physical layer frame (DSL PHY) through a DSL connection;
  • PON PHY PON physical layer frame
  • DSL PHY DSL physical layer frame
  • the user equipment can receive the physical layer frame of the user side interface (the user side interface PHY), and the PON MAC function of the user equipment completes the process of grouping the physical layer frame of the user side interface into a PON MAC layer frame, and the PON MAC layer frame is configured.
  • the DSL physical layer frame (DSL PHY) is obtained and sent to the ONU physical converter through the DSL.
  • the CPE may be a home gateway, an enterprise network gateway, or a cell gateway, and may be used for different access scenarios of home access, enterprise access, or mobile bearer access.
  • FIG. 5 a schematic diagram of a protocol stack for an access system of a new fiber optic network using an Ethernet bridge is provided, which differs from the protocol stack shown in Figure 4 in that:
  • the ONU physical converter After receiving the downlink PON physical layer frame, the ONU physical converter terminates the PON physical layer, adds an Ethernet broadcast frame header to the downlink PON MAC layer frame, and sends it to the corresponding DSL physical layer processing unit through the Ethernet bridge, DSL physics. After the layer processing unit removes the Ethernet broadcast frame header from the Ethernet frame, the PON MAC layer frame is encapsulated into the DSL physical layer frame and sent to the user equipment;
  • the DSL physical layer processing unit terminates the DSL physical layer, converts the downlink PON physical layer frame to the downlink PON MAC layer frame, and adds the Ethernet broadcast frame header to the downlink PON MAC layer frame.
  • the Ethernet frame is forced to be forwarded through the Ethernet bridge
  • the Ethernet broadcast frame header is removed to obtain the PON MAC layer frame
  • the PON MAC layer frame is encapsulated into the PON physical layer frame, and sent to the PON physical layer frame.
  • each of the user equipments has its own ONU ID, and in the EPON or the next-generation EPON, the preamble in the Ethernet frame is modified to carry the ONU ID.
  • EPON MAC layer frame therefore, the protocol stack shown in Figure 5 is more suitable for use in EPON or next-generation EPON.
  • the CPE in the optical network needs to be configured by the network side automatic configuration server through TR069 (CPE WAN management protocol), and the physical parameters of the access line between the ONU and the user side device are required.
  • the static configuration is performed, and then the physical parameters of the access line are sent to the user-side device through the ONU.
  • the maintenance is difficult and the maintenance cost is high.
  • the OLT is used as an example for the ONU and the user equipment.
  • the ONU and the user equipment need the following physical parameters of the DSL access line: Minimum Data Rate, Maximum Data Rate, and Low. Minimum Data Rate in low power state Maximum Interleaving Delay, Actual Interleaving Delay.
  • the ONU needs to report various state parameters of the access line to the OLT.
  • the OLT connection is used between the ONU and the user equipment, the ONU needs to report various status parameters of the DSL access line to the OLT.
  • DSL type DSL port state (Actual data rate Up- and Downstream), Attainable data rate Up- and Downstream.
  • the present embodiment provides two improved configuration methods.
  • FIG. 6 a schematic diagram of an access system for a fiber-optic network that is free of configuration for an ONU physical converter is provided, and is described as follows:
  • the LTE, the cable TV cable, and the wireless interface are respectively connected between the user equipment and the ONU physical converter, and the corresponding FTTB (Fibre To The Building) is adopted.
  • FTTB Fibre To The Building
  • Fiber to the Building /FTTN (Fibre To The Node), FTTC (Fibre To The Curb) and FTTDp (Fibre to Drop/Distribution Point, fiber to distribution point) deployment, and , DSL modem (DSL modem), cable modem (cable TV cable modem) and wireless terminal integrated in the customer premises equipment, DSLAM (DSL Access Multiplexer), CMTC (Cable Modem Termination System, cable The modem station system) and the WiFi AP (Access Point)/BS (Base Station) are integrated with the ONU physical converter.
  • DSL modem DSL modem
  • cable modem cable modem
  • wireless terminal integrated in the customer premises equipment
  • DSLAM DSL Access Multiplexer
  • CMTC Code Division Multiplexer
  • CMTC Code Division Multiplexer
  • WiFi AP Access Point
  • Base Station Base Station
  • the ONU physical converter that is originally required to be maintained by the operator is reversed from the configuration management mode of the user equipment on the user side, and the ONU is connected to the user side device.
  • the configuration of the physical parameters of the access line is transferred to the user equipment.
  • the physical parameters of the ONU physical converter are no longer required to be configured.
  • the physical parameters can be forwarded only, and the reporting of the status parameters of the access line is also transferred.
  • the operator no longer needs to perform configuration management maintenance on the ONU physical converter, which can greatly reduce maintenance costs.
  • the ONU physical converter can obtain the physical parameters of the access line by negotiating with the user equipment, and the user equipment reports the status parameter of the access line to the OLT, and is no longer reported by the ONU physical converter.
  • the physical parameters of the access line can be configured to the user equipment through the management plane protocol of the PON.
  • the various status parameters of the access line can also be reported through the management plane protocol of the PON.
  • the client device will support the OMCI (ONT Management and Control Interface) protocol to configure and manage the client device, configure the physical parameters of the access line, or report the access line. Status parameters;
  • the client device will support the ETH OAM (ETH Operation Administration and Maintenance) protocol to configure and manage the client device and complete the physical configuration of the access line. Parameters or report various status parameters of the access line.
  • OMCI ONT Management and Control Interface
  • ETH OAM ETH Operation Administration and Maintenance
  • the client device and the CPE can be integrated into one device. Therefore, the physical parameters of the access line can also be configured by using a configuration protocol of the CPE (for example, TR-069).
  • FIG. 7 Another schematic diagram of an access system for a fiber-optic network that is free of configuration for the ONU physical converter is provided and described as follows:
  • the user equipment on both sides of the access line and the physical layer of the ONU physical converter are interchanged, that is, the user of the existing ONU is connected.
  • the in-line physical layer processing function is moved to the user-side device (the client device) before the CPE, and the access layer physical layer processing function of the user-side device before the original CPE is moved up to the access node ONU (ONU physical converter) ).
  • the DSL, the cable TV cable, and the wireless interface are respectively connected between the user equipment and the ONU physical converter, and the corresponding FTTB/FTTN is adopted respectively.
  • FTTC and FTTDp deployment methods, and DSL modems, cable modems and wireless terminals are integrated in the ONU physical converter, DSLAM, CMTC and WiFi AP/BS are integrated with the customer premises equipment.
  • the ONU physical adapter In the second configuration mode, only the physical layer chip of the ONU physical converter and the user side device is interchanged. For example, if a DSL connection is used between the client device and the ONU physical converter, the ONU physical adapter is used.
  • the built-in DSL Modem is not a DSLAM.
  • the client device has the DSL physical layer processing function of the existing ONU (ie, the single-port DSLAM function).
  • the CPE in the client device is interconnected with the DSL Modem through a single-port DSLAM; DSLAM does not have port aggregation.
  • Single-port DSLAMs can also be built into CPE.
  • ONU physical adapters can have multiple DSL modems to support multiple DSL ports.
  • the ONU physical adapter has a built-in Cable Modem instead of the CMTS, and the client device has the original ONU Cable physical layer processing.
  • Function ie single-port CMTS function
  • CPE is interconnected with Cable Modem through single-port CMTS; single-port CMTS has no port aggregation function, single-port CMTS can also be built in CPE, ONU physical adapter can have Multiple Cable Modems support multiple cable TV cable ports.
  • the U ONU physical adapter has a built-in wireless terminal instead of a BS/AP, and the client device has the wireless physics of the original ONU.
  • the layer processing function that is, the BS/AP function
  • the CPE in the client device is interconnected with the wireless terminal through the BS/AP; the BS/AP actually supports only one wireless terminal accessing the ONU physical adapter on the network side, BS
  • the /AP can also be built into the CPE.
  • the ONU physical adapter can have multiple wireless terminals supporting multiple client devices.
  • the second configuration mode provided in this embodiment can realize the physical of the access line between the ONU and the user side device by exchanging the physical layer chip of the ONU physical converter and the user side device (integrated with the user equipment).
  • the configuration of the parameter is transferred to the user equipment.
  • the physical parameters of the ONU physical converter are no longer required to be configured. Only the physical parameters can be forwarded, and the reporting of the status parameters of the access line is also transferred to the user equipment. The operator no longer needs to perform configuration management maintenance on the ONU physical converter, which can greatly reduce maintenance costs.
  • the method for the access system of the access system of the optical network is improved according to the present invention.
  • the communication method of the access system based on the optical network is provided. As shown in FIG. 8, the method includes the following steps.
  • the user equipment and the ONU physical converter establish a communication connection according to the default first physical parameter; wherein the default first physical layer parameter is pre-stored in the user equipment and the ONU physical converter.
  • the DSL connection is used as an example for the line between the user equipment and the ONU physical converter.
  • the first physical parameter may include: Minimum data rate, maximum data rate, minimum data rate in low power state, maximum interleaving delay, actual interleaving delay, etc.
  • the client device establishes a communication connection with the OLT.
  • the client device receives the second physical layer parameter that is sent by the OLT.
  • the second physical layer parameter is a new physical layer parameter or an updated physical layer parameter delivered by the OLT.
  • the client device negotiates with the ONU physical converter, and establishes a communication connection according to the second physical layer parameter delivered by the OLT.
  • the client device reports the data queue status to the OLT.
  • the OLT allocates a time slice to the user equipment.
  • the time slice includes an uplink time slice and a downlink time slice.
  • the OLT After the OLT completes the allocation of the time slice, the OLT sends the configuration information including the time slice to the user equipment, where the uplink time slice is used to instruct the user equipment to send the uplink data to the OLT.
  • the time of the downlink time slice is used to indicate the time when the user equipment receives the downlink data sent by the OLT.
  • the client device and the OLT perform data interaction according to the time slice.
  • the method may further include: the client device reporting the state of the physical line connected to the OLT to the OLT.
  • the embodiment further provides a method for adjusting the bandwidth online, as shown in FIG. 9, specifically including the following steps:
  • the OLT receives a request for increasing bandwidth for temporary communication of the user
  • the request for increasing the bandwidth of the temporary communication may be temporarily sent by the user; or the user may make a reservation in advance, and when the reservation time is reached, it is sent by the operator network side to the OLT; or the operator actively sends the OLT to the OLT.
  • the OLT re-allocates bandwidth for the user equipment, and obtains a third physical layer parameter according to the current bandwidth allocation.
  • the OLT sends a third physical layer parameter to the user equipment.
  • the client device establishes a new communication connection with the ONU physical converter according to the third physical layer parameter.
  • the client device obtains the redistributed bandwidth, and communicates with the OLT by using the re-allocated bandwidth. 306. After the temporary communication ends, the OLT restores the bandwidth for the user equipment.
  • the OLT restores bandwidth for the user equipment, including:
  • the OLT sends the second physical layer parameter to the user equipment.
  • the user equipment and the ONU physical converter re-establish a communication connection according to the second physical layer parameter.
  • 306-3 The user equipment re-establishes a communication connection with the OLT, so that the user equipment recovers the bandwidth before the temporary communication.
  • the embodiment provides a communication method of an access system based on the optical network of Embodiment 1, in the method, The user equipment establishes a communication connection with the OLT through the physical layer parameters sent by the OLT to the user equipment, and does not need to be configured by the ONU physical converter maintained by the operator side, which can save the maintenance cost of the operator, and is directly operated by the user equipment. Reporting the status of the physical line to the OLT does not require the participation of the ONU physical converter.
  • the user equipment transmits and receives data according to the uplink time slice and the downlink time slice without collision, so that the ONU physical converter does not need to perform PON.
  • the maintenance of the control surface also saves the maintenance cost of the operator.
  • the embodiment provides a user equipment, which is connected to the ONU physical converter through a non-PON optical fiber and is located on the user side, and is used to implement the control plane function and the PON MAC function of the ONU, according to the uplink time slice allocated by the OLT.
  • the first user-side physical layer frame is sent to the OLT through the ONU physical converter, or the first user-side physical layer frame sent by the OLT through the ONU physical converter is received according to the downlink time slice allocated by the OLT.
  • the client device is further configured to: receive a second physical layer parameter that is sent by the OLT through the ONU physical converter, and establish a new communication connection with the ONU physical converter according to the second physical layer parameter delivered by the OLT.
  • the client device is further configured to: before receiving the second physical layer parameter that is sent by the OLT through the ONU physical converter, establish a communication connection with the ONU physical converter according to the default first physical layer parameter, and establish a communication connection with the OLT.
  • the default first physical layer parameter is pre-stored in the client device.
  • the client device is further configured to report the status of the physical line connected to the OLT to the OLT through the ONU physical converter.
  • the foregoing user equipment includes:
  • the user side interface unit 301 is configured to receive an uplink second user side physical layer frame sent by the user, or send the downlink second user side physical layer frame to the user;
  • the virtual ONU processing unit 302 is configured to implement the control plane function, the PON MAC function, and the QoS function of the ONU, and encapsulate the uplink second user side physical layer frame into an uplink PON MAC layer frame, and pass the uplink time slice allocated by the OLT.
  • the user-side physical layer processing unit 303 sends an uplink PON MAC layer frame to the ONU physical converter, or receives the downlink PON MAC layer frame sent by the user-side physical layer processing unit 303 according to the downlink time slice allocated by the OLT, and converts the downlink PON MAC layer frame.
  • the downlink second user-side physical layer frame is sent to the user-side physical layer processing unit 303 through the user-side interface unit 301;
  • control plane function of the ONU includes: performing the ranging of the user equipment together with the OLT, so that the OLT can allocate the uplink time slice and the downlink time slice to the user equipment according to the ranging result, and additionally, the optional support is received.
  • the PON MAC function includes: Completing the framing of the PON MAC layer frame.
  • the QoS function includes: establishing a queue and assigning priorities of uplink data for the client device.
  • the user-side physical layer processing unit 303 is configured to convert the uplink PON MAC layer frame sent by the virtual ONU processing unit 302 into an uplink first user-side physical layer frame corresponding to the non-PON physical signal, and send the signal to the ONU physical body through the non-PON physical signal. And receiving the downlink first user-side physical layer frame sent by the ONU physical converter, converting the downlink first user-side physical layer frame into a downlink PON MAC layer frame, and sending the signal to the virtual ONU processing unit 302.
  • the user equipment further includes: a CPE unit 304;
  • the CPE unit 304 is connected to the user-side interface unit 301 and the user equipment UE, and is configured to receive the downlink second user-side physical layer frame sent by the user-side interface unit 301, and forward the data to the UE, or receive the uplink data sent by the UE, and The physical layer frame converted to the uplink second user side is sent to the user side interface unit 301.
  • the foregoing user equipment further includes:
  • the external power supply unit 305 is configured to supply power to the ONU physical converter.
  • the embodiment provides a user equipment, by moving the control plane function, the PON MAC function, and the QoS function of the ONU in the existing ONU to the user equipment, and the existing ONU is removed from the function module.
  • the ONU physical converter has only the conversion function of the PON physical layer frame and the first user-side physical layer frame. Therefore, the operator does not need to perform maintenance of the ONU control plane function, PON MAC function and QoS function, and reduces maintenance. Difficulty can greatly reduce maintenance costs.
  • Example 4
  • the embodiment provides an ONU physical converter.
  • the ONU physical converter is connected to the OLT through an optical fiber, and is configured to receive a PON physical layer frame sent by the OLT through the PON physical signal, and convert the PON physical layer frame into a non-PON physical signal. Corresponding the first user-side physical layer frame, and transmitting the first user-side physical layer frame to the user equipment through the non-PON physical signal; or receiving the first user-side physical layer frame sent by the user equipment through the non-PON physical signal, Converting the first user-side physical layer frame into a PON physical layer frame corresponding to the PON physical signal, and transmitting the PON physical layer frame to the OLT through the PON physical signal.
  • the ONU physical converter is further configured to forward the second physical layer parameter that is sent by the OLT to the user equipment, and establish a new communication connection with the second physical layer parameter that is sent by the user equipment according to the OLT.
  • the ONU physical converter is further configured to establish a communication connection with the user equipment according to the default first physical layer parameter before the user equipment receives the second physical layer parameter that is forwarded by the OLT through the ONU physical converter;
  • the default first physical layer parameter is pre-stored in the client device. Further, the 0NU physical converter is further configured to forward the state of the physical line of the communication connection reported by the client device to the OLT.
  • the ONU physical converter includes: a non-PON physical layer processing unit 401, a switch control unit 402, a switch unit 403, and a PON physical layer processing unit 404;
  • the non-PON physical layer processing unit 401 is configured to receive an uplink first user-side physical layer frame sent by the user equipment by using a non-PON physical signal, and convert the uplink first user-side physical layer frame into an uplink PON MAC layer frame.
  • the switch control unit 402 is configured to: when receiving the uplink PON MAC layer frame sent by the user equipment, generate a switch control signal corresponding to the user equipment, and send a switch control signal corresponding to the user equipment to the switch unit 403;
  • the switch unit 403 includes an output port 0 and at least one input port l-n, and the input port 1-n and the access
  • the user equipments of the ONU physical converter are in one-to-one correspondence, and are configured to connect a path between the input port and the output port corresponding to the user equipment according to the switch control signal corresponding to the user equipment, and the path is used for non-PON physical layer processing.
  • the unit 401 sends the uplink PON MAC layer frame converted by the non-PON physical layer processing unit 401 to the PON physical layer processing unit 404;
  • the PON physical layer processing unit 404 is configured to convert the uplink PON MAC layer frame into an uplink PON physical layer frame, and send the uplink PON physical layer frame to the OLT by using the PON physical signal.
  • an architecture diagram of an access system of a fiber network is provided for implementing uplink communication.
  • the system includes an OLT, a plurality of ONU physical converters connected to the OLT through the optical fiber, and a plurality of client devices connected to the ONU physical converter, and the access system is suitable for accessing the user equipment of each ONU physical converter. A small number of cases.
  • the connection between the user equipment and the ONU physical converter through the DSL, the power line, the cable TV cable, the Ethernet network cable, and the wireless interface is taken as an example, and accordingly, the non-PON physical layer processing in this embodiment is performed.
  • the unit is specifically a DSL physical layer processing unit, a power line physical layer processing unit, a cable physical layer processing unit, an Ethernet physical layer processing unit, and a wireless physical layer processing unit.
  • the uplink first user side physical layer frame is specifically an uplink first DSL physical layer frame, an uplink first power line physical layer frame, an uplink first cable physical layer frame, an uplink first Ethernet physical layer frame, and an uplink first Wireless physical layer frame.
  • the client device_11 is connected to the ONU physical converter_1 through the DSL, and the non-PON physical layer processing unit corresponding to the client device_11 is specifically a DSL physical layer processing unit;
  • the client device _1N is connected to the ONU physical converter_1 through the power line, and the non-PON physical layer processing unit corresponding to the customer equipment ⁇ is specifically a power line physical layer processing unit;
  • the customer end device _N1 passes the cable television cable and the ONU physical converter _N connection, the non-PON physical layer processing unit corresponding to the user terminal is specifically a cable physical layer processing unit;
  • the client device NN is connected to the ONU physical converter _N through the wireless interface, and corresponds to the user equipment NN
  • the non-PON physical layer processing unit is specifically a wireless physical layer processing unit.
  • the user equipment can be connected to the ONU physical converter through an Ethernet network cable, and the non-PON physical layer processing unit corresponding to the user equipment is specifically an Ethernet physical layer processing unit;
  • the non-PON physical layer processing unit converts the uplink first user side physical layer frame into an uplink PON MAC layer frame, which may be:
  • the non-PON physical layer processing unit removes the frame header of the uplink first user side physical layer frame from the uplink first user side physical layer frame to obtain an uplink PON MAC layer frame.
  • the DSL physical layer processing unit converts the uplink first DSL physical layer frame into an uplink PON MAC layer frame by using a DSL connection between the user equipment and the ONU physical converter.
  • the specific part is:
  • the DSL physical layer processing unit will The uplink DSL physical layer frame removes the frame header of the DSL physical layer frame to obtain an uplink PON MAC layer frame.
  • a PON physical layer processing unit configured to convert an uplink PON MAC layer frame into an uplink PON physical layer frame, and pass the
  • the PON physical signal sends an uplink PON physical layer frame to the OLT.
  • a switch control unit configured to: when receiving an uplink PON physical layer frame sent by the user equipment, generate a switch control signal corresponding to the user equipment, and send a switch control signal corresponding to the user equipment to the switch unit;
  • the switch unit includes an output port and at least one input port, and the input port has a one-to-one correspondence with the user equipment that accesses the physical converter of the ONU.
  • the port 0 is an output port
  • the port 1 is To port n is the input port;
  • the switch control signal is used to instruct the switch unit to turn on an input port and an output port corresponding to the switch control signal to form a path.
  • the power receiving unit is configured to obtain power through the external power supply unit in the user equipment, so as to obtain power on the user side, which can solve the problem that the operator has difficulty in long-distance power supply to the ONU;
  • a switching unit configured to turn on a path between the input port and the output port corresponding to the user equipment according to the switch control signal, where the path is used to transfer the non-PON physical layer processing unit corresponding to the user equipment to the PON physical layer processing unit Uplink PON MAC layer frame.
  • the switch control unit when the user equipment_1_1 sends the first uplink user-side physical layer frame to the OLT, the switch control unit is notified by the power line physical layer processing unit, and the switch control unit sends a switch control signal to the switch unit, the switch After receiving the switch control signal, the unit turns on the port n and the port 0 to form a path, and the user equipment can send the uplink PON physical layer frame to the OLT through the power line physical layer processing unit.
  • the ONU physical converter may further include a PON optical module, where the PON optical module is in an uplink direction of the PON physical layer processing unit, and the ONU physical converter sends a PON physical signal to the OLT through the PON optical module, and accordingly, the switch
  • the control signal can also be used to control the illumination of the PON optical module.
  • the user equipment sends the first uplink user-side physical layer to the OLT according to the uplink time slice allocated by the OLT.
  • the frame, and the switch control signal also corresponds to the uplink time slice, which ensures that the uplink data does not collide in the ONU physical converter.
  • the ONU physical converter includes: a PON physical layer processing unit 404, a non-PON physical layer processing unit 401, and a port 1-n corresponding to the user equipment accessing the ONU physical converter. And a downlink data replication unit 406;
  • the PON physical layer processing unit 404 is configured to receive a downlink PON physical layer frame sent by the OLT through the PON physical signal, and convert the downlink PON physical layer frame into a downlink PON MAC layer frame.
  • the port 1-n is used to respectively switch on the line between the downlink data replication unit 406 and the non-PON physical layer processing unit 401, and the line is used to send the downlink converted by the PON physical layer processing unit 404 to the non-PON physical layer processing unit 401.
  • PON MAC layer frame
  • the downlink data replication unit 406 is configured to copy the downlink PON MAC layer frame converted by the PON physical layer processing unit 404 to all lines belonging to the ONU physical converter;
  • the non-PON physical layer processing unit 401 is configured to convert the downlink PON MAC layer frame into the downlink first user-side physical layer frame, and send the downlink first user-side physical layer frame to the user equipment through the non-PON physical signal.
  • an architecture diagram of an access system of a fiber network is provided for implementing downlink communication.
  • the system The utility model comprises an OLT, a plurality of ONU physical converters connected to the OLT through the optical fiber, and a plurality of client devices connected to the ONU physical converter, wherein the access system is adapted to access the number of the user equipments of each ONU physical converter. Less situation.
  • the ONU physical converter includes: a PON physical layer processing unit, a non-PON physical layer processing unit, a port corresponding to the user equipment accessing the ONU physical converter, and a downlink data replication unit.
  • the PON physical layer processing unit is configured to receive a downlink PON physical layer frame sent by the OLT through the PON physical signal, and convert the downlink PON physical layer frame into a downlink PON MAC layer frame.
  • the non-PON physical layer processing unit is configured to convert the downlink PON MAC layer frame into a downlink first user side physical layer frame corresponding to the non-PON physical signal, and send the downlink first user side physical layer frame to the downlink first user side physical layer frame by using the non-PON physical layer signal Client device.
  • the connection between the user equipment and the ONU physical converter through the DSL, the power line, the cable TV cable, the Ethernet network cable, and the wireless interface is taken as an example, and correspondingly, the non-in this embodiment
  • the PON physical layer processing unit is specifically a DSL physical layer processing unit, a power line physical layer processing unit, a cable physical layer processing unit, an Ethernet physical layer processing unit, and a wireless physical layer processing unit.
  • the downlink first user side physical layer frame is specifically a downlink first DSL physical layer frame, a downlink first power line physical layer frame, a downlink first cable physical layer frame, and a downlink first wireless physical layer frame, respectively;
  • the client device_11 is connected to the ONU physical converter_1 through the DSL, and the non-PON physical layer processing unit corresponding to the client device_11 is specifically a DSL physical layer processing unit;
  • the client device _1N is connected to the ONU physical converter_1 through the power line, and the non-PON physical layer processing unit corresponding to the customer equipment ⁇ is specifically a power line physical layer processing unit;
  • the customer end device _N1 passes the cable television cable and the ONU physical converter _N connection, the non-PON physical layer processing unit corresponding to the user terminal is specifically a cable physical layer processing unit;
  • the client device NN is connected to the ONU physical converter _N through the wireless interface, and corresponds to the user equipment NN
  • the non-PON physical layer processing unit is specifically a wireless physical layer processing unit.
  • the client device can also be connected to the ONU physical converter through an Ethernet network cable, and the non-PON physical layer processing unit corresponding to the client device is specifically an Ethernet physical layer processing unit.
  • the non-PON physical layer processing unit converts the downlink PON MAC layer frame into the downlink first user side physical layer frame, which may be:
  • the non-PON physical layer processing unit adds the downlink PON MAC layer frame to the frame header of the downlink first user-side physical layer frame, and obtains the downlink first user-side physical layer frame.
  • the DSL connection is taken as an example between the client device and the ONU physical converter.
  • the DSL physical layer processing The unit adds a frame header of the downlink first DSL physical layer frame to the downlink first PON MAC layer frame, to obtain a downlink first DSL physical layer frame.
  • the port is configured to respectively connect a line between the downlink data replication unit and the non-P0N physical layer processing unit, where the line is used by the P0N physical layer processing unit to send the downlink PON converted by the PON physical layer processing unit to the non-PON physical layer processing unit.
  • MAC layer frame
  • the downlink data replication unit is configured to copy the downlink PON MAC layer frame converted by the PON physical layer processing unit to all the lines belonging to the ONU physical converter.
  • the PON physical layer processing unit may convert the downlink PON MAC layer frame into an Ethernet frame, and send it to each port through a downlink data data replication unit, for example, in an ONU physical conversion.
  • This mode can be used in the scenario where an Ethernet backplane is installed in the device. The following describes the functions of each component of the ONU physical converter in this downlink transmission mode:
  • a PON physical layer processing unit configured to receive a downlink PON physical layer frame sent by the OLT, and convert the downlink PON physical layer frame into a downlink PON MAC layer frame, and add an Ethernet broadcast frame header in the downlink PON MAC layer frame to obtain a downlink Ethernet a frame, and sent to the downlink data replication unit;
  • a downlink data replication unit configured to copy a downlink Ethernet frame converted by the PON physical layer processing unit to belong to
  • All lines of the ONU physical converter are sent to the non-PON physical layer processing unit through each port;
  • the non-PON physical layer processing unit is configured to receive the foregoing Ethernet frame, and remove the Ethernet broadcast frame header from the Ethernet frame to obtain a downlink PON MAC layer frame, and convert the downlink PON MAC layer frame into a downlink first user side physical layer.
  • the frame is sent to the client device.
  • the above ONU physical converter includes: a non-PON physical layer processing unit 401, an Ethernet bridge 405, and a PON physical layer processing unit 404;
  • the non-PON physical layer processing unit 401 is configured to receive an uplink first user-side physical layer frame sent by the user equipment by using a non-PON physical signal, and convert the uplink first user-side physical layer frame into an uplink PON MAC layer frame, and The PON MAC layer frame is sent to the Ethernet bridge through an input port corresponding to the non-PON physical layer processing unit 401;
  • the Ethernet bridge 405 includes an output port 0 and at least one input port ln for receiving an uplink PON MAC layer frame sent by the non-PON physical layer processing unit through the input port 1-n, and transmitting to the PON physical layer through the output port 0.
  • the PON physical layer processing unit 404 is configured to receive an uplink PON MAC layer frame sent by the Ethernet bridge 405 through the output port 0, and convert the uplink PON MAC layer frame into an uplink PON physical layer frame, and send the PON physical signal to the OLT. Send the uplink PON physical layer frame.
  • the PON physical layer processing unit 404 is configured to receive a downlink PON physical layer frame sent by the OLT, and convert the downlink PON physical layer frame into a downlink PON MAC layer frame, and add an Ethernet broadcast frame header to the downlink PON MAC layer frame to obtain an ether. a network frame, and send an Ethernet frame to the Ethernet bridge 405;
  • the Ethernet bridge 405 includes an input port 0 and at least one output port ln for receiving an Ethernet frame sent by the non-PON physical layer processing unit 401 through the input port 0, and transmitting it to the PON physical layer through the output port 1-n.
  • the non-PON physical layer processing unit 401 is specifically configured to receive an Ethernet frame sent by the Ethernet bridge 405 through the output port, and remove the Ethernet broadcast frame header in the Ethernet frame to obtain a downlink PON MAC layer frame, and the downlink PON MAC layer frame.
  • the first user-side physical layer frame is sent to the downlink, and the downlink first user-side physical layer frame is sent to the user equipment through the non-PON physical signal.
  • this embodiment further provides an access system for another optical network.
  • an Ethernet bridge is used in the ONU physical converter to support the port. More (that is, more access to the client device), and the cost is lower.
  • the access system shown in FIG. 19 specifically includes: an OLT, a plurality of ONU physical converters connected to the OLT through the optical fiber, and a plurality of client devices connected to the ONU physical converter.
  • the ONU physical converter includes: a non-PON physical layer processing unit, a PON physical layer processing unit, an Ethernet bridge, and a power receiving unit, wherein the Ethernet bridge includes an output port and at least one input port.
  • the non-PON physical layer processing unit is configured to receive an uplink first user-side physical layer frame sent by the user equipment through the non-PON physical signal, convert the uplink first user-side physical layer frame into an uplink PON MAC layer frame, and uplink the PON
  • the MAC layer frame is sent to the Ethernet bridge through an input port corresponding to the non-PON physical layer processing unit; or, the downlink PON MAC layer frame sent by the Ethernet bridge through the output port is received, and the downlink PON MAC layer frame is converted into the first downlink.
  • the user-side physical layer frame sends the downlink first user-side physical layer frame to the user equipment through the non-PON physical signal.
  • the PON physical layer processing unit is configured to receive an uplink PON MAC layer frame sent by the Ethernet bridge through the output port, and convert the uplink PON MAC layer frame into an uplink PON physical layer frame, and send the uplink PON physical layer frame to the OLT by using the PON physical signal Or, receiving the downlink PON physical layer frame sent by the OLT through the PON physical signal, converting the downlink PON physical layer frame into the downlink PON MAC layer frame, and transmitting the downlink PON MAC layer frame to the corresponding non-PON object through the output port of the Ethernet bridge; The processing unit of the layer.
  • An Ethernet bridge configured to receive a downlink PON MAC layer frame sent by the PON physical layer processing unit through the input port, and send the signal to the non-PON physical layer processing unit through the output port; or receive the non-PON physical layer processing unit to send through the input port
  • the uplink PON MAC layer frame is sent to the PON physical layer processing unit through the output port.
  • the PON MAC layer frame in the downlink PON MAC layer frame or the uplink PON MAC layer frame needs to be an Ethernet frame, and is more suitable for EPON or next-generation EPON.
  • the Ethernet bridge is used to perform forced MAC forwarding on the PON MAC layer frame from the user-side port in the uplink direction, that is, it is forcibly forwarded to the upstream output port to the OLT, and is not broadcasted to the user-side port.
  • an ARP Address Resolution Protocol
  • an ARP agent is implemented in the Ethernet bridge unit, and the MAC address of the ONU physical adapter is returned to the user side device when receiving the ARP request from the user side.
  • the PON MAC layer frame from the PON port is forwarded by MAC address.
  • port 1 to port n of the Ethernet bridge are input ports, and port 0 is an output port; when the data transmission direction is the downlink direction, the Ethernet bridge Port 1 to port n are output ports, and port 0 is an input port.
  • the power receiving unit is configured to obtain power through the external power supply unit in the user equipment, so as to obtain power on the user side, which can solve the problem that the operator has difficulty in long-distance power supply to the ONU;
  • the connection between the user equipment and the ONU physical converter through the DSL, the power line, the cable TV cable, the Ethernet network cable, and the wireless interface is taken as an example, and accordingly, the non-PON physical layer processing in this embodiment is performed.
  • the unit is specifically a DSL physical layer processing unit, a power line physical layer processing unit, a cable physical layer processing unit, an Ethernet processing layer processing unit, and a wireless physical layer processing unit.
  • the first user-side physical layer frame is specifically a first DSL physical layer frame, a first power line physical layer frame, a first cable physical layer frame, a first Ethernet physical layer frame, and a first wireless physical layer frame.
  • the client device_11 is connected to the ONU physical converter_1 through the DSL, and the non-PON physical layer processing unit corresponding to the client device_11 is specifically a DSL physical layer processing unit;
  • the client device _1N is connected to the ONU physical converter_1 through the power line, and the non-PON physical layer processing unit corresponding to the customer equipment ⁇ is specifically a power line physical layer processing unit;
  • the customer end device _N1 passes the cable television cable and the ONU physical converter _N connection, the non-PON physical layer processing unit corresponding to the user terminal is specifically a cable physical layer processing unit;
  • the client device NN is connected to the ONU physical converter _N through the wireless interface, and corresponds to the user equipment NN
  • Non The PON physical layer processing unit is specifically a wireless physical layer processing unit.
  • the non-PON physical layer processing unit corresponding to the user equipment is specifically an Ethernet physical layer processing unit.
  • the non-PON physical layer processing unit converts the uplink first user side physical layer frame into an uplink PON MAC layer frame, which may be:
  • the non-PON physical layer processing unit removes the frame header of the uplink first user side physical layer frame from the uplink first user side physical layer frame to obtain an uplink PON MAC layer frame.
  • the DSL physical layer processing unit converts the uplink first DSL physical layer frame into an uplink PON MAC layer frame by using a DSL connection between the user equipment and the ONU physical converter.
  • the specific part is:
  • the DSL physical layer processing unit will The uplink first DSL physical layer frame removes the frame header of the uplink first DSL physical layer frame, and obtains an uplink PON MAC layer frame.
  • the non-PON physical layer processing unit converts the downlink PON MAC layer frame into the downlink first user side physical layer frame, which may be:
  • the non-PON physical layer processing unit adds the downlink PON MAC layer frame to the frame header of the downlink first user-side physical layer frame, and obtains the downlink first user-side physical layer frame.
  • a DSL connection between the client device and the ONU physical converter is taken as an example.
  • the DSL physical layer processing unit adds a frame header of the downlink DSL physical layer frame to the downlink PON MAC layer frame to obtain a downlink DSL physical layer frame.
  • the embodiment provides an ONU physical converter, by moving the control plane function, PON MAC function and QoS function of the ONU in the existing ONU to the user equipment, and the 0NU physical converter is the existing 0NU. After the function module is removed, only the conversion function of the P0N physical layer frame and the first user-side physical layer frame can be performed. Therefore, the operator does not need to perform the maintenance of the ONU control plane function, the PON MAC function, and the QoS function. , reducing maintenance difficulty and greatly reducing maintenance costs.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computing Systems (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Small-Scale Networks (AREA)

Abstract

Dans ses modes de réalisation, la présente invention se rapporte à un système d'accès et à un procédé de communication d'un réseau à fibre optique. L'invention appartient au domaine technique des communications. Le procédé selon l'invention comprend les étapes suivantes : une ONU virtuelle sur le côté utilisateur est établie; les modules de fonction de plan de contrôle de l'ONU, de fonction MAC du PON et de fonction QoS, qui se trouvent dans l'ONU qui précède, sont descendus dans l'ONU virtuelle; ensuite, l'ONU qui précède, et qui est supprimée des modules de fonction susmentionnés, agit comme un convertisseur physique de l'ONU, et elle n'a plus qu'une fonction de conversion entre la trame physique du PON et la première trame physique sur le côté utilisateur. Dans ces conditions, comme l'opérateur n'a plus besoin de maintenir les modules de fonction de plan de contrôle de l'ONU, de fonction MAC du PON et de fonction QoS, la difficulté d'entretien et les coûts de maintenance du système peuvent être réduits.
PCT/CN2012/079767 2012-08-07 2012-08-07 Système d'accès, et procédé et dispositif de communication d'un réseau à fibre optique WO2014022966A1 (fr)

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CN201280001150.3A CN103875216B (zh) 2012-08-07 2012-08-07 一种光纤网络的接入系统、通信方法及设备
PCT/CN2012/079767 WO2014022966A1 (fr) 2012-08-07 2012-08-07 Système d'accès, et procédé et dispositif de communication d'un réseau à fibre optique
EP12882723.5A EP2770675B1 (fr) 2012-08-07 2012-08-07 Système d'accès, et procédé et dispositif de communication d'un réseau à fibre optique
US14/322,574 US9413480B2 (en) 2012-08-07 2014-07-02 Access system, communication method and device for optical fiber network
US15/212,832 US9628213B2 (en) 2012-08-07 2016-07-18 Access system, communication method and device for optical fiber network

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US9413480B2 (en) 2016-08-09
CN103875216A (zh) 2014-06-18
US20140314413A1 (en) 2014-10-23
EP2770675A1 (fr) 2014-08-27
US20160329980A1 (en) 2016-11-10
EP2770675B1 (fr) 2017-03-01
CN103875216B (zh) 2016-11-16
US9628213B2 (en) 2017-04-18

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